public class Training05 {
    public static void main(String[] args) {
        char[] s = {'序','顺','字','组','数','倒','颠'};
        //
        for (int i = 0;i < s.length/2;i++){
            char c = s[i];
            //
            s[i] = s[s.length-i-1];//
            s[s.length-i-1] = c;
        }
        System.out.println(s);
    }
}
